These are operator driven stocks, they will come up and go down every 1-3months. If you can swim with operators then you can earn as much as 300% return whenever operators come into play otherwise you loose it all.
My advice, buy Cals around 0.5-0.53 and cover it at 0.7 or 0.75 (if your broker allow such a less brokerage)... do not expect any return and only put the money which you have assumed that you have lost already.
I have 5k shares in Cals and dont even remember that I have them
they are a long term bet it may give me something while I am not expecting anything.